Chicago police are searching for suspects after an apparent robbery turned deadly at a Southwest Side muffler shop. CBS 2's Susanna Song reports. (Source: CBS Chicago)

Chicago police are searching for suspects after an apparent robbery turned deadly at a Southwest Side muffler shop. CBS 2's Susanna Song reports. (Source: CBS Chicago)

Peter NickeasTribune reporter

The owner of a Gage Park muffler shop was killed in an armed robbery Wednesday night, according to police.

He was shot in the back as he tried to run from his attackers, police said.

Michael Kozel, of the 2700 block of West Siepp Street in the Wrightwood neighborhood, was pronounced dead at John H. Stroger Jr. Hospital of Cook County at 9:09 p.m.

Two men entered Independent Mufflers Inc. about 5:20 p.m., in the 5600 block of South Western Avenue, and demanded money, police said. Kozel tried to flee but was shot in the back once, authorities said.

He was pronounced dead at John H. Stroger Jr. Hospital of Cook County about 9:10 p.m., the fifth homicide in Chicago in the first two days of 2013, according to the Cook County medical examiner's office.

Records show that Kozel owned and operated the muffler shop.

About a half hour later, a 25-year-old man was shot in the leg in the the 7200 block of South Maplewood Avenue in the Marquette Park neighborhood. He saw two men in ski masks before one opened fire, hitting him in the leg. The round exited his heel and he was treated at Holy Cross Hospital for the wound, police said.

Another man, 32, was shot in the 5900 block of South Campbell Avenue about 2:30 a.m. Thursday. He and his 23-year-old cousin were arguing outside when the younger man shot him seven times, police said. Both live in the home of the 32-year-old's mom, police said.

The shooter, who was shirtless at the time, took off running and isn't in custody. The 32-year-old was taken to Stroger Hospital and is in critcal condition with wounds to his abdomen and legs, police said. As of about 5 a.m. he was in surgery.